Default message format must be set to use Plain Text.
An XCCDF Rule
Description
<VulnDiscussion>Outlook uses HTML as the default e-mail format, but users can choose a format other than the default when composing messages. This setting controls the default message format in Outlook. </VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility>System Administrator</Responsibility><Responsibility>Information Assurance Officer</Responsibility><IAControls></IAControls>
- ID
- SV-34105r1_rule
- Severity
- Medium
- References
- Updated
Remediation - Manual Procedure
Set the policy value for User Configuration -> Administrative Templates -> Microsoft Outlook 2010 -> Outlook Options -> Mail Format -> Internet Formatting -> Message Format “Set message format” to “Enabled: Plain Text".